Question

How can I show some default input while there is no user input?

I mean when I want to add e.g. a new appointment in the calender I see
“Subject” and “Location” in grey letters. When i click on it, they go away and i see the user input.

How to make this in my own app?

Answer 1

If you have a textbox control you can use the GotFocus event to remove the text(which you can define initially) and change the Foreground to App.Resources["PhoneTextBoxForegroundBrush"] as SolidColorBrush from the code behind.

<TextBox FontFamily="Segoe WP Semibold" FontSize="{StaticResource 
PhoneFontSizeMediumLarge}"  x:Name="textBox" GotFocus="myHandler_GotFocus"
Text="Enter some text.." Foreground="{StaticResource PhoneSubtleBrush}" />

In code behind

private void myHandler_GotFocus(object sender, RoutedEventArgs e){ this.textBox.Text = ""; }